vinej/sml

sml : simple math language

SML : alpha 0.0.1

What is SML

SML is a small math language build around 3 open source softwares

1. KLIB from Attractive Chaos
2. GNU GSL : The GNU Scientific Library
3. PLPLOT : PLplot is a cross-platform software package for creating scientific plots

At first, I was interested only to learn how to transform an INFIX expression into a POSTFIX expression because I was playing with a HP50G emulator calculator. As an exercice to re-learn more about C developement I wanted to develop a small postfix calculator.

After a while, I found the KLIB library with a more complete implementation than mine. After using the KLIB library, I decided that I could probably create a small math language to do the link with GSL and PLPLOT.

The result : SML is born.

So, SML it's a language with only the minimum needed to link with GSL and PLPLOT. I want the language to be as simple as possible like Python. It is very far to be a complete language like Python, it's more like a small implementation like GNUPLOT for PLPLOT.

To conclude, SML is only a hobby for me to learn. My goal is to link all the PLPLOT functions and some of the GSL math functions (complex, vector, matrix, integration and differiation formulas.)

WHO would like to use SML

I really don't know, because there are so many softwares around this subject, but if you program in C with GSL and PLPLOT, it could be a new usefull tool for you.

Language exemple

You can:

• Commands separator are 'new line' or ';'
• Line continuation caracter is '\' to create expressions spread on many lines
• The caractere '#' is used to insert comment into the code
• Functions or sub-routines are created with 'def .... enddef' and execute with 'exe'
• Loops are created with 'for ... break ... continue ... next'
• Conditions are manage with 'if ... else ... end'
• Variables are created with the equal caracter 'var = expression'

def(add, v1, v2)
  v1 + v2
enddef

print('Start of program')

sum = exe(add,3,4)
print('the total is ',sum)
print('Sinus of 60 =', sin(60))

# for loop from 1 to 10, increment of 1
for(j,1,10,1)
  print(j)
next

# like do while
j = 1
for  
  j = j + 1
  if(j == 5)
    print(j)
    break
  end
next

# while do
j = 1
for
  if(j == 10)
    break
  else
    if (j == 3)
      j = 7
    end
  end
  j = j + 1
next

#matrixs & vectors
v1 = vector_alloc(3)
v2 = vector_alloc(3)

m1 = matrix_alloc(2,2)
matrix_set_all(m1,3)
print(m1)
matrix_write('mat.dat', m1)
matrix_set_all(m1,2)
print(m1)
matrix_read('mat.dat', m1)
print(m1)

#vector
vector_set(v1,0,4)
vector_set(v1,1,5)
vector_set(v1,2,6)

vector_write('v1.dat',v1)
vector_read('v1.dat',v1)

#complex
c1 = complex(2,3)
c2 = complex(4,3)
c2 = complex_sqrt(c2)
c3 = complex_add(c1,c2)
print(c3)

# plotting 32bits only version for now
v1 = vector(2)
vector_put(v1,4,7)
plinit("wingcc")
plenv(1,10,1,10,1,0)
plline(2,v1,v1)
plspause(1)
plot_end()